Ⅰ.Match the word with its meaning.

　　1．leap A．宇宙探测器，航天探测器

　　2．joint B．航天飞机

　　3．probe C．收看(电视)；收听(广播)

　　4．accustomed D．假定，假设

　　5．shuttle E．高级的，先进的

　　6．historic F．爆炸

　　7．tune G．耐心

　　8．witness H．目击，亲眼看见；亲身经历

　　9．assume I．共同的；联合的

　　10．patience J．历史性的，有重大历史意义的

　　11．advanced K．习惯的

　　12．burst L．飞跃，跳跃

　　答案：1～6　LIAKBJ　7～12　CHDGEF

　　Ⅱ.Write down the meaning of phrases in each sentence.

　　1．She has mastered 2,000 English words so far. 到目前为止

　　2．The bus slowed down for the next stop.减速

　　3．We have been good friends ever since we were very young.自从；自......以后

　　4．They made a plan for English study at the very beginning of this term.在......一开始的时候

　　5．When I told them the truth, they were all in shock; they couldn't believe it.处于震惊中

　　6．Madame Curie and her husband continued to work in spite of all the discomforts.不管

　　7．This is the first time I have left my country and set foot on foreign soil.踏上

　　8．I thought he would be too old to get to the top of the mountain, but he made it at last.做成，成功

　　9．Most parents are not well aware of the danger of their babies' eating jelly, which causes most unfortunate incidents to happen.意识到

　　10．After living there for one year, they have been accustomed to working there.习惯于

　　Look at the following pictures and try to describe them.